Granite Ridge
Natural gas power plant · Rockingham County, New Hampshire
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Granite Ridge Energy LLC
- County
- Rockingham County
- Generating units
- 3
- Share of state capacity
- 17.24%
- Rank among natural gas plants in New Hampshire
- #1 of 3
- EIA plant code
- 55170
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| STG | Natural Gas Fired Combined Cycle | 270 MW | 232 MW | 2003 | Operating |
| CT11 | Natural Gas Fired Combined Cycle | 260 MW | 218 MW | 2003 | Operating |
| CT12 | Natural Gas Fired Combined Cycle | 260 MW | 218 MW | 2003 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in New Hampshire
| Seabrook | Nuclear | 1,242 MW |
| Newington Energy Center | Natural gas | 606 MW |
| Merrimack | Coal | 496 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 790 MW solar plant and a 790 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All New Hampshire power plants · What New Hampshire actually generates